Buffer overflow in Belkin F9k1122
CVE-2026-5043
A weakness has been identified in Belkin F9K1122 1.00.33. The impacted element is the function formSetPassword of the file /goform/formSetPassword of the component Parameter Handler. This manipulation of the argument webpage causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.011 (63.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.011 · change: +0.003
Affected products
- Belkin F9k1122 — versions 1.00.33
- Belkin F9k1122 Firmware — versions 1.00.33
Weakness classification (CWE)
References
- vuldb.com/vuln/353966 (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/vuln/353966/cti (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/submit/779124 (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/Belkin/vul_154/README.md (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-5043?
- CVE-2026-5043 is a high-severity vulnerability in Belkin F9k1122, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-03-29.
- How severe is CVE-2026-5043?
- High severity. CVSS v3 base score is 8.8 out of 10.